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TM 9-2320-364-20-1
2-14. DDEC III/IV TROUBLESHOOTING (CONT).
Section V. DIAGNOSTIC DATA READER INFORMATION (Cont.)
E.
SWITCH/LIGHT STATUS
The Switch/Light Status Menu is the set of DDEC III/IV data that describe the operational (ON/OFF) status of the functions
assigned to the ECM input and output connector terminals.
NOTES:
(1) The connector cavity designations describe the physical locations of the assigned functions.
(2) The DDR displays the assigned function text as described in Table 2-21 (Vehicle Switch Input Options) and Table 2-22
(ECM Output Options) on page 2-798.
(3) `N/A' will be displayed if a function number of (0 = NONE) has been assigned to any of the connector cavities.
(4) `ON' indicates that the input switch or output function is active.
(5) Menu items that are not applicable (N/A) to PLS are not shown in the following charts.
ECM INPUT SWITCHES
G1 DIAG REQUEST
Definition: Indicates the operational status of the switch input at vehicle connector cavity G1 (diagnostic request
switch).
Typical Range: ON or OFF
ECM OUTPUTS STATUS
CHECK ENG LT
Definition: Indicates the operational status of the check engine light.
Typical Range: ON or OFF
CHECK GAUGES LT
Definition: Indicates the operational status of the check gauges light.
Typical Range: ON or OFF
A1 EXT BRK ENAB
Definition: Indicates the operational status of the output at the vehicle connector cavity A1 (engine brake enable).
Typical Range: ON or OFF

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